This is your html element. It should encase the document as a whole save for the <!DOCTYPE html> element.
This is the closing tag of a head element. By itself it is not a head element because this is incorrect syntax. Most elements, unless they are self-closing, should have an opening tag and a closing tag.
As said before, your head element should go inside the html element. And you’re missing other elements required by the step to pass.
Hello. I recommend starting here. This is the very beginning of the course. The exercise you’re currently on is to learn CSS, the language with which you can style a page. It would be really hard to learn CSS without having first learned HTML.
The Cat Photo App exercise should guide you in the right direction and help you learn HTML, so you can later on tackle CSS. Best of luck!